JP5538790B2 - A rigid plate with a simulated three-dimensional shape of molars used in the manufacture of dentures, especially complete denture - Google Patents

Description

  The present invention relates to a rigid plate having a simulated three-dimensional shape of a molar for accurately and easily performing occlusal acquisition and artificial tooth arrangement at the time of dental technician dentures, especially when producing complete dentures.

Occlusal acquisition is the setting and recording of the central occlusal position of a jaw with a missing tooth, which is one of the important operations in the production of dentures. Since all the reference teeth are lost in the edentulous jaw, it is not easy to reproduce the central occlusal position at the time of toothing, and the most appropriate position is determined by observing the existing anatomical or functional elements. Need to be determined. The proper central occlusal position in a denture is not always equal to that in a tooth. It should be determined in consideration of changes in the jaw and surrounding tissues after tooth loss, temporomandibular joint condition, maintenance of dentures, wearing feeling, and occlusal habits. Specifically, an alternative occlusal floor is created in the missing tooth and absorbed alveolar part, and this is used in the oral cavity. First, the maxillary anterior tooth arrangement standard (restoration of aesthetics) and the occlusal plane are determined. . Next, set the vertical jaw position (distance between upper and lower jaws and occlusal height), and finally determine the central occlusal position (the intercuspal position) by determining the front and rear and left and right horizontal jaw positions.
The occlusal floor is composed of a foundation floor and an occlusal levee. The foundation floor is a portion that becomes a denture base, and the occlusal ridge corresponds to a portion where artificial teeth are arranged (see Non-Patent Document 1).

Denture Technical Engineering 1 Full Dentures "by Nishiura Satoshi January 15, 1977, published by Yakuhin Yakuhin Publishing Co., Ltd., pages 44-46

  In the process of manufacturing upper and lower jaw complete dentures, there is a dentist's work act of obtaining occlusion as a task to determine the intermaxillary jaw relationship, but the occlusal floor used at that time is usually an acrylic resin base floor It was created by placing an occlusal embankment (U-shaped paraffin wax occlusal embankment) on top. After using such an occlusal floor and mounting it in the oral cavity and trying it out, determine the maxillary anterior tooth arrangement standard, occlusal plane, and intermaxillary relationship (vertical jaw position and horizontal jaw position).

Conventionally, the occlusal levee portion of the occlusal floor used at the time of occlusal acquisition in the upper and lower complete denture manufacturing process has been conventionally used for paraffin wax, which is removed and adjusted or heated and softened for occlusal acquisition.
However, in determining the positional relationship between the upper and lower jaws, the material of both (upper and lower occlusal embankments) is paraffin wax and the plane-to-plane relationship makes the task of positioning the relationship between the upper and lower jaws difficult. That is, the problem is that the positional relationship between the two is likely to change, and the vertical positional relationship once determined easily slides back and forth and changes. Moreover, it is a more difficult task for patients whose jaw positions are not fixed.

  The conventional occlusal acquisition method and intermaxillary relationship recording floor and its parts, among the upper and lower jaw base floors that respectively match the upper and lower jaws, plate-like writing blades are attached to the left and right molar parts of one of the base floors, and the other Attach a recording block that the leading edge of the writing blade contacts the left and right molar parts of the foundation floor, and adjust the overall height and left and right height of the recording block or the writing blade with these attached in the oral cavity. There is an occlusal acquisition method characterized by determining the lower jaw position (Patent Document 1).

JP 2005-152106 A

  However, the drawing blade and the recording block described in Patent Document 1 may be formed using a resin in the same manner as the basic floor, and various other materials can be used (see paragraph 0015 of the specification). However, in reality, the resin is the mainstream. In this method, a resin-made (plastic) plate-like drawing blade is attached to a position corresponding to the left and right molars of the upper base floor of the plate-like drawing blade so that the width-equivalent portion of the plate-like drawing blade is upright or upright. A rectangular parallelepiped recording block is attached to the left and right molar parts of the foundation floor, and the upper and lower jaw positions are determined by placing the upper jaw writing blade in the groove carved in the lower jaw recording block. The work of determining the vertical and horizontal positions, and fixing the recording block and drawing blade to the upper and lower foundation floors is a complicated and time-consuming operation, which is a difficult task for the dentist. Therefore, there is a high possibility of suffering in the patient. For the above reasons, it is considered that this method is not implemented at present.

  In order to solve the above-described problems, the present invention provides a denture that can perform the difficult task of positioning the intermaxillary relationship between the upper and lower jaws more simply, accurately and smoothly. The object is to provide a rigid plate having a simulated three-dimensional shape. That is, according to the present invention, a rigid plate having a simulated three-dimensional shape of a molar is fixed to the maxillary occlusal ridge, and the upper shape of the simulated three-dimensional shape of a molar versus a mandibular occlusal ridge, that is, a solid three-dimensional shape of a hard unevenness. The problem is to be solved by making an impression on the upper surface of the occlusal embankment made of paraffin wax in the lower jaw.

The rigid plate having a simulated three-dimensional shape of a molar used in the manufacture of a denture according to the present invention, particularly a complete denture, is a portion corresponding to the left and right molars of a U-shaped paraffin wax maxillary occlusal levee placed on a resin base floor. A rigid plate having a size to be coated, and having an upper surface of a simulated three-dimensional shape of the first premolar, the second premolar, the first premolar, and the second premolar protruding from the front on the upper surface of the rigid plate. A denture, in particular a complete denture, in which the upper shape of the simulated three-dimensional shape of each molar tooth protrudes from the upper occlusal ridge plane, and a fixing means for fixing to the upper occlusal ridge is provided on the back surface or lower portion of the rigid plate A rigid plate having a simulated three-dimensional shape of a molar used at the time of manufacture, and the fixing means for fixing the back surface or lower part of the rigid plate to the maxillary occlusal levee is large enough to cover the left and right molar equivalent parts of the maxillary occlusal ridge One side is folded so that the band width of the rigid plate is the same width as the shape formed so that it is slightly narrower from the back to the front, and a folded band plate piece having equal gaps is formed through the bent part Or bend one side so that the band width of the rigid plate is the same as that of the rigid plate formed in the same width, and form a folded band plate piece having equidistant gaps through the bent portion A number of through holes are formed in the folded strip piece, and the material of the upper occlusal embankment is filled and fixed in each of the through holes and the gaps.

The invention according to claim 2 is a rigid plate having a size covering a portion corresponding to the left and right molars of a U-shaped paraffin wax maxillary occlusal embankment placed on a resin base floor, the upper surface of the rigid plate The upper part of the simulated three-dimensional shape of the first premolar, the second premolar, the first premolar, and the second premolar protrudes from the front, and the upper part of the pseudo three-dimensional shape of each molar is the upper occlusion In a rigid plate having a simulated three-dimensional shape of a denture, which is used when producing a denture, which protrudes from the ridge plane and has a fixing means for fixing to the upper occlusal ridge on the back surface or lower portion of the rigid plate fixing means for the back side or bottom of the rigid plate is fixed to the upper jaw bite Tsutsumi, as will be hanging both end portions along the longitudinal extent of the rigid plates for covering the left and right molar equivalent site of the maxillary occlusal Tsutsumi downward Occasionally The bent portion is formed, and bored holes at intervals on one or both of the bent portions of the both side, fitted on the upper jaw bite crest between the both folded portions, and the upper jaw bite into the through hole The embankment material is filled and formed and fixed.

  The rigid plate having a simulated three-dimensional shape of a molar used in the manufacture of a denture according to the present invention is sized to cover the left and right molar equivalent portions of a U-shaped paraffin wax occlusal embankment placed on a resin base floor. The upper surface of the first premolar, the second premolar, the first premolar, and the second premolar are projected on the upper surface of the rigid plate from the front, and the premature solid of the molar is formed. The upper shape of the shape protrudes from the occlusal levee plane, and a fixing means for fixing to the occlusal levee is provided on the back surface or lower part of the rigid plate, so that the rigid plate of the upper occlusal levee with respect to the lower occlusal levee The protrusion (lingual cusp) has 5 points. The occlusal acquisition of the upper and lower maxillary ridges is performed while adjusting such as removing or adding the paraffin wax of the occlusal ridge of the lower jaw so that the five points are attached with good balance in the front, rear, left and right. Through this work, the jaw position can be confirmed until the final decision is made, and the accuracy of occlusal acquisition is markedly improved over conventional methods.

  In addition, the conventional upper and lower jaw occluses could not be taken out from the patient's oral cavity unless the upper and lower jaws are securely fixed and integrated. It can be taken out from the oral cavity. After removal from the patient's mouth, the upper and lower jaw occlusion ridges can be easily returned to the occlusal state by engaging the indentations on the lower jaw occlusion ridge with the protrusions of the upper jaw rigid plate. Also, because the occlusal ridges of the upper and lower jaws were fixedly integrated and removed from the oral cavity, excessive opening was causing excessive pain to the patient, but it is also released from this .

  In particular, by providing a fixing means for fixing to the occlusal embankment on the back surface or the lower part of the rigid plate, the left and right molar portions of the upper surface of the paraffin wax occlusal embankment are covered with a band plate-like rigid plate and the rigid plate is attached to the occlusal embankment. Since it is in a fixed state and the rigid plate itself has rigidity, there is no vertical displacement and positioning can be performed accurately and easily.

  Further, in the artificial tooth arrangement that is the subsequent technical work, the upper shape of the simulated three-dimensional shape of the molar formed on the surface of the rigid plate is an anatomical occlusal surface form, and the mandibular artificial teeth are arranged accordingly. It becomes a work to go, and it becomes possible to carry out the engineering work smoothly. Therefore, the conventional arrangement of artificial teeth (meshing positioning operation) requires skill, but even an inexperienced engineer can easily do so.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1A is a plan view showing an embodiment of the present invention, FIG. 1B is a front view thereof, FIG. 1C is a bottom view thereof, and FIG. 1D is a side view thereof.
The rigid plate 1 having a simulated three-dimensional shape of a molar is made of, for example, a metal material such as stainless steel having a thickness of 0.8 mm, hard resin, or other rigid material. That is, although expressed as a rigid plate in the present invention, it is made of a rigid material made of a material other than a plate made of a metal material or a hard resin material as long as it is a material that is not harmful when placed in the oral cavity of a patient. Plates are also included.
In this embodiment, the rigid plate 1 will be described by taking a metal plate as an example. The metal plate which is the rigid plate 1 is slightly narrowed so that its length is 30 mm, its width is 10 mm at the end of the second molar equivalent site, and 9 mm at the end of the first premolar equivalent site. A case where the thickness is formed and the thickness is 5 mm will be described. Since the size of the rigid plate 1 having a simulated three-dimensional shape of the molars may vary depending on the patient or the like, the above size is an example and is not limited to the above size. On the surface of the rigid plate 1 having a simulated three-dimensional shape of a molar, a simulated concave-convex shape corresponding to the upper part of each three-dimensional shape of the four teeth from the first premolar to the second molar is formed. The maximum height of the simulated uneven shape is formed to 1.5 mm. The concavo-convex shape gives an anatomical occlusal surface form for occlusion with various artificial teeth, and in particular, by setting the portion corresponding to the lingual cusp high, indentation remains as 5 points on the mandibular occlusal levee 3 (See FIG. 3).

  A rigid plate 1 having a simulated three-dimensional shape of a molar is formed by using a rigid plate 1a having rigidity. The rigid plate 1a is folded on one side so that the band width is the same as the shape formed so that the band width is slightly wider from the front to the back, and the folded band plate piece 1d having gaps 1c at equal intervals through the bent portion 1b. Is formed by processing a single plate. A large number of through holes 1e are formed in the folded strip piece 1d. A paraffin hook is poured into each of the through hole 1e and the gap 1c and fixed to the maxillary occlusal levee 2. In this way, the rigid plate 1 having a simulated three-dimensional shape of the molar is securely fixed to the maxillary occlusal bank 2.

FIG. 2 is a perspective view showing a state in which a rigid plate 1 having a simulated three-dimensional shape of a molar is attached to the left and right portions on the occlusal levee of the upper jaw model. The size of the rigid plate 1 having a simulated three-dimensional shape of the molar is formed such that the band width of the rigid plate 1 is slightly wider from the front to the back. In short, it is formed in a shape that can be placed while fitting to the corresponding part of the occlusal embankment.
In the figure, 2 indicates the maxillary occlusal embankment, 4 indicates the foundation floor, and 5 indicates the upper jaw model.
The position corresponding to the mouth angle of the maxillary occlusal ridge 2 manufactured as usual is used as a guide, and the upper surface of the posterior maxillary occlusal ridge 2 is cut to a thickness of about 3 mm from there, and the artificial teeth (molar teeth) are arranged side by side. A rigid plate 1 having a simulated three-dimensional shape of a molar is set. At that time, the protrusion on the lingual side (the lingual cusp) should be raised by about 1 mm. In order to fix and maintain the rigid plate 1 having a simulated three-dimensional shape of the molars on the maxillary occlusal levee 2, paraffin hooks are poured into the through holes 6 and fixed securely.

  As an embodiment of a fixing means for fixing to the occlusal dam on the back surface or the lower portion of the rigid plate 1 having a simulated three-dimensional shape of a molar, a shape formed so that the band width of the rigid plate 1 is slightly wider from the front to the back One side is bent so as to have the same width as that, and a folded strip piece 1d having gaps 1c at equal intervals is formed through the bent portion 1b. A large number of through holes 1e are formed in the folded strip piece 1d. Paraffin wax, which is a material for the occlusal embankment, is filled and fixed in each of the through hole 1e and the gap 1c.

  As another embodiment of the fixing means for fixing to the occlusal dam on the back surface or the lower part of the rigid plate 1 having a simulated three-dimensional shape of a molar, the longitudinal direction of the rigid plate 1 having a simulated three-dimensional shape of a molar is shown. A bent portion 1f is formed so that both end portions hang downward. A through-hole 1g is formed at an interval in one or both of the bent portions 1f on both sides. The both bent portions 1 f and 1 f are fitted to the upper jaw occlusal bank 2. Then, a paraffin wack, which is a material of the maxillary occlusal ridge 2, is filled in the through hole 1 g, and the rigid plate 1 having a simulated three-dimensional shape of a molar is firmly fixed to the maxillary occlusal ridge 2.

  As another embodiment of the fixing means for fixing to the occlusal embankment on the back surface or the lower portion of the rigid plate 1 having a simulated three-dimensional shape of the molar, a space is provided on the back surface of the rigid plate 1 having the simulated three-dimensional shape of the molar. The legs 1h having the same length are formed so as to hang down (see FIGS. 5A to 5D). Embed the foot 1h in the maxillary bite 2 and fix it firmly.

As another example of the surface of the rigid plate 1 having a simulated three-dimensional shape of molars, an uneven shape corresponding to the upper part of each of the four-dimensional simulated three-dimensional shapes from the first premolar to the second molar (each This includes a method (see FIGS. 6 (a) to 6 (d)) that expresses and forms a cusp) with a simple conical shape.
In the figure, 8 is a simulated three-dimensional shape of the first premolar buccal cusp, 9 is a simulated three-dimensional shape of the second premolar buccal cusp, 10 is a simulated three-dimensional shape of the first premolar buccal cusp, 11 is a simulated three-dimensional shape of the first molar distal buccal cusp, 12 is a simulated three-dimensional shape of the second molar mesial buccal cusp, 13 is a simulated three-dimensional shape of the second molar distal buccal cusp, 14 Is the simulated three-dimensional shape of the first premolar lingual cusp, 15 is the simulated three-dimensional shape of the second premolar lingual cusp, 16 is the simulated three-dimensional shape of the first premolar mesial lingual cusp, and 17 is the first A simulated three-dimensional shape of the distal molar lingual cusp, and 18 a simulated three-dimensional shape of the second molar distal lingual cusp.

BRIEF DESCRIPTION OF THE DRAWINGS It is drawing which shows one Example of this invention, (a) is the top view, (b) is the front view, (c) is the bottom view, (d) is the side view. It is a perspective view which shows the state which attaches the rigid plate provided with the simulated three-dimensional shape of the molar at the right and left applicable locations on the occlusion bank of the upper jaw model. It is a perspective view which shows the case where the rigid plate provided with the simulated three-dimensional shape of the molars which concerns on this invention is attached to an upper jaw model, and the five indentations are formed in the applicable location of the occlusal embankment upper surface of a lower jaw model at the time of occlusion. (A) is the top view, (b) is the front view, (c) is the bottom view, (d) is the side view. (A) is the top view, (b) is the front view, (c) is the bottom view, (d) is the side view. (A) is the top view, (b) is the front view, (c) is the bottom view, (d) is the side view.

1 Rigid plate with simulated three-dimensional shape of molar
DESCRIPTION OF SYMBOLS 1a Rigid plate 1b Bending part 1c Gap 1d Folding strip piece 1e Through hole 1f Bending part 1g Through hole 1h Foot
1i Upper part of simulated three-dimensional shape of molar
2 Maxillary bite 3 Maxillary bite
4 Foundation floor 5 Maxilla model
6 Mandibular jaw model 7 Indentation 8 Simulated solid shape of the first premolar
9 Simulated solid shape of the second premolar 10 Simulated solid shape of the first molar
11 Simulated three-dimensional shape of the second molar 12 Simulated three-dimensional shape of the first premolar buccal cusp 13 Simulated three-dimensional shape of the second premolar buccal cusp 14 Simulated solid of the first premolar buccal cusp Shape 15 Simulated three-dimensional shape of the first molar distal buccal cusp 16 Simulated three-dimensional shape of the second molar mesial buccal cusp 17 Simulated three-dimensional shape of the second molar distal buccal cusp 18 First premolar tongue Simulated three-dimensional shape of the side cusp 19 Simulated three-dimensional shape of the second premolar lingual cusp 20 Simulated three-dimensional shape of the first premolar mesolingual cusp 21 Simulated three-dimensional shape 22 of the first premolar distal lingual cusp Simulated three-dimensional shape of the second lingual distal lingual cusp

Claims (2)

A rigid plate sized to cover the left and right molar portions of a U-shaped paraffin wax maxillary occlusal embankment placed on a resin base floor, the first premolars from the front on the upper surface of the rigid plate 2 premolars, 1st molars, 2nd molars of the upper part of the simulated three-dimensional shape projecting, the upper part of the simulated three-dimensional shape of each molar tooth projecting from the maxillary occlusal ridge plane, and the rigid plate A rigid plate having a simulated three-dimensional shape of a molar used in the manufacture of a denture, especially a complete denture , provided with a fixing means for fixing to the maxillary occlusal ridge on the back surface or the lower portion of the rigid plate , The fixing means for fixing the lower part to the upper occlusal levee is the same as the shape formed so that the band width of the rigid plate of the size covering the left and right molars of the upper occlusal ridge is slightly narrower from the back to the front Width and So that one side is bent and a folded strip with equal spacing is formed through the bent portion, or the band width of the rigid plate is all the same as the rigid plate formed to the same width. Bending one side, forming a folded strip having gaps at equal intervals through the folded portion, drilling a plurality of through holes in the folded strip, and engaging the upper jaw in each of the through holes and gaps A rigid plate having a simulated three-dimensional shape of a molar used in the manufacture of a denture, particularly a complete denture, characterized in that the material of the bank is filled and formed and fixed . A rigid plate sized to cover the left and right molar portions of a U-shaped paraffin wax maxillary occlusal embankment placed on a resin base floor, the first premolars from the front on the upper surface of the rigid plate 2 premolars, 1st molars, 2nd molars of the upper part of the simulated three-dimensional shape projecting, the upper part of the simulated three-dimensional shape of each molar tooth projecting from the maxillary occlusal ridge plane, and the rigid plate backside or the lower part of the rigid plate having a simulated three-dimensional shape of the molar to be used for denture especially manufactured denture provided with fixing means for fixing to the upper jaw bite Tsutsumi, a back surface or bottom of the rigid plate The fixing means for fixing to the maxillary occlusal levee is formed with bent portions so that both ends along the longitudinal direction of a rigid plate of a size covering the left and right molar teeth of the maxillary occlusal levee are suspended downward. Bent portions at intervals on one or both bored a hole in, fitted in the upper jaw bite crest between the both folded portions, and with the material of the upper jaw bite bank is filled formed on the through hole fixing A rigid plate having a simulated three-dimensional shape of a molar used in the manufacture of dentures, particularly complete dentures.

Images